Prism for electric lamps.



J. G. ZUBLI.

PRISM FOR ELECTRIC LAMPS.

APPLICATION FILED NOV. 5-, 1907.

909,507. Patented Jan. 12, 1909.

I 1 f I l I I A A TTOHNE Y S UNITED STATES PATENT enrich.

JUSTUS O. ZUBLI, OF SEATTLE, WASHINGTON.

PRISM FOR ELECTRIC LAMPS.

new and Improved Prism for Electric Lamps,

of which the following is a full, clear, and exact description. Q

The invention relates to electric lamps used for decorating andilluminating purposes for signs and the like, and its object is toprovide a new and improved prism for electric lamps, arranged to utilizethe rays of light of the electric lamp for giving a brilliant eflect.

The invention consists of novel features and parts and combinations ofthe same, which will be more fully described hereinafter and thenpointed out in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this speclfication, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a front elevation of the improvement as applied; Fig. 2 is aside elevation of the same and showing the reflector in section; Fig. 3is a front elevation of the improvement in the form of a letter for anilluminated sign; Fig. 4 is a side elevation of a modified form of theimprovement as applied, and showing the reflector in section; Fig. 5 isa front elevation of a modified form of the improvement, and Fig. 6 isaperspective View of a modified form of the prism.

As illustrated in Figs. 1 and 2, the bulb A of an electric lamp isdisposed'horizontally, and in front of it is suspended a prism B,provided at its upper end with an eye C, enga 'ng a ring D formed on asuspending rod preferably 'made'ofwire, and terminating at its rear endin a coil D fitting artly over a tubular reflector E held on the ulb A,the said coil D having its terminal passing around the rear end of thebulb A adjacent to the socket A. By the arrangement shown and described,the rays of light emanatin from the electric lamp pass through t e prismB suspended in front of the bulb A, so as to give a brilliant effect. Bysuspending the prismB in the manner described it is free to swing and toturn partly around its longitudinal axis by wind or by a current of airsupplied by an electric fan or other means. The reflector E may beSpecification of Letters Patent.

Application filed November 5, 1907.

Patented Jan. 12, 1909.

Serial No. 400,772.

! of opaque material or colored transparent or translucent material, toheighten the effect of the illumination. The lower end of the prism B isprovided with a rod F, covered by a sleeve F of rubber or other softmaterial, to form a cushion arranged within a circular guard D, formedon an arm D extending from the ring D of the suspending rod 1). By thearrangement described the swim ing movement of the prism B is limited bythe guard D, to prevent the prism from striking the bulb A. I

As illustrated in Fig. 3, the prisms B are suspended in front of thebulbs A of electric lamps by the use of a suspension device G made ofwire or other suitable material, and fastened by screws H or other.meansto a fixed support. Now by reference to Fig. 3, it wil be seen that thesuspension device G and the prisms B and bulbs A are so arranged as toform a letter of the alphabet, to permit of using the device for anilluminated sign, in which each prism is illuminated by an electriclamp.

As shown in Fig. 4, the bulb A of the electric lam is engaged by thespring arm I of a re ector I having a front reflecting surface I and arear reflecting surface 1 so as to throw the rays of light in bothdirections. The prism B in front of the bulb A is suspended from arod'J, attached to the reflector I, and the said prism B is provided atits lower end with a rod K having a cushion K extending within acircular guard L, likewise attached to the reflector I. In this case,therreflector I, the rod J, the prism B and guard L form a device forelectric lamp.

Inthe modified form shown in Fig. 5, a plurality of prisms B are shownsuspended from a suspending frame N in front of the bulb A of theelectric lamp.

In Fig. 6 is illustrated aprism B having colored stripes B" at theforward faces to heighten the eflect of the illustration.

Having thus described my invention, I

"Patent:

1. An illuminating device, com rising an electric lamp, and a rismrotatab y mounted in front of the ulb. of the lamp, and means inconnection with the mounting for permitting said prism to swingwithrespect to the lamp.

2. An attachment for electric lamps, comclaim as new and desire tosecureby Letters,

convenient attachment to the bulb A of an prising a prism, a suspendingrod for the and means in connection with the mounting same and aving ameans for engagement for permitting the prism to swing with rewith thelamp, and a guard in connection spect to the lamp. with said means forlimiting the swing ng In testimony whereof I have signed my 5 movementof the said prism. name to this specification in the presence of 15 '3.An attachment for electric lamps comtwo subscribing witnesses. v

prising a reflector for engagement with the JUSTUS C. ZUBLI. mlb of thelam a prism rotatably mount- Witnesses: ed'in front of t e lamp bulb,the mounting JOHN S. JUREY,

10 of the prism being carried by the reflector PETER BLANKEVOORT.

